diff -r cefc9219bb48 -r cd9db17c7ab5 controls/VariablePanel.py
--- a/controls/VariablePanel.py	Mon Mar 27 18:03:26 2017 +0300
+++ b/controls/VariablePanel.py	Tue Mar 28 11:31:05 2017 +0300
@@ -781,7 +781,8 @@
         else:
             self.SaveValues()
             if colname == "Class":
-                wx.CallAfter(self.ParentWindow.RefreshView, False)
+                self.ClearLocation(row, col, value)
+                wx.CallAfter(self.ParentWindow.RefreshView)
             elif colname == "Location":
                 wx.CallAfter(self.ParentWindow.RefreshView)
 
@@ -791,6 +792,13 @@
         else:
             event.Skip()
 
+    def ClearLocation(self, row, col, value):
+        if self.Values[row].Location != '':
+            if self.Table.GetColLabelValue(col, False) == 'Class' and value not in ["Local", "Global"] or \
+               self.Table.GetColLabelValue(col, False) == 'Type' and not self.Parent.Controler.IsLocatableType(value):
+                self.Values[row].Location = ''
+            self.RefreshValues()
+
     def BuildStdIECTypesMenu(self,type_menu):
             # build a submenu containing standard IEC types
             base_menu = wx.Menu(title='')
@@ -849,6 +857,7 @@
 
         label_value = self.Table.GetColLabelValue(col, False)
         if label_value == "Type":
+            old_value = self.Values[row].Type
             classtype = self.Table.GetValueByName(row, "Class")
             type_menu = wx.Menu(title='')   # the root menu
 
@@ -870,6 +879,9 @@
             self.VariablesGrid.PopupMenuXY(type_menu, corner_x, corner_y)
             type_menu.Destroy()
             event.Veto()
+            value = self.Values[row].Type
+            if old_value != value:
+                self.ClearLocation(row, col, value)
         else:
             event.Skip()